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Plate tectonics
The study of the formation and movement of Earth’s crustal plates
Inner core
The center of the Earth. Made of solid iron and nickel.
Outer core
Liquid iron, gives earth its magnetic field
Mantle
The largest portion of the earth, made of dense rock.
Asthenosphere
The upper most region of the mantle.
Oceanic crust
3-6 miles thick, very dense
Continental Crust
20-50 miles thick, less dense
Crust
The “outer skin” of the earth
Continental drift
Continents once formed a single land mass called Pangaea, and drifted apart.
Alfred Wegener
1912 geologist proposed the theory of continental drift.
Pangaea
Land mass of all the continents.
Evidence for plate tectonics
The continents look like they “fit together”Fossils of the same type and age found on different continents
Matching rock types
Earthquake and volcano locations
Mid-ocean ridges and trenches
Diverging Boundary
sliding boundary
Sun-ducting boundary
Collision Boundary
Hot Spot: Hawaii diagram
Accreted Terrance
A chunk of land from another location
Micro Plate
Rocky Mountain Formation
A shallow angle sub-ducting oceanic plate which pushed up the overlying continental crust.
Hot-spot
A stationary plume of magma in the mantle which will create a chain of islands as they slide over.
Shield volcano
Lava is runny, Hawaiian islands
What happened to molokai
A giant land slide. Debris is scattered northward in the bottom of the pacific ocean.
Why are the hawaiian islands getting smaller
sinking
erosion
Isostacy
A balance of gravitational forces pushing up and down on the Earths crust
Isostacy related to plate tectonics
High mountains have roots underneath them so they can float.
Layers of the earth
Inner core, outer core, mesosphere, crust
Note 
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